<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .font-weight .one{
            font-weight: 900;
        }
        .font-weight .two{
            font-weight: 100;
        }
    </style>
</head>
<body>
    <div class="font-weight">
        <div class="one">
            粗粗粗
        </div>
        <div class="two">
            细细细
        </div>
    </div>
</body>
</html>